vsbus.c revision 1.26
1 /* $NetBSD: vsbus.c,v 1.26 2000/06/18 22:47:19 matt Exp $ */ 2 /* 3 * Copyright (c) 1996, 1999 Ludd, University of Lule}, Sweden. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Ludd by Bertram Barth. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed at Ludd, University of 19 * Lule}, Sweden and its contributors. 20 * 4. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/buf.h> 38 #include <sys/conf.h> 39 #include <sys/file.h> 40 #include <sys/ioctl.h> 41 #include <sys/proc.h> 42 #include <sys/user.h> 43 #include <sys/map.h> 44 #include <sys/device.h> 45 #include <sys/dkstat.h> 46 #include <sys/disklabel.h> 47 #include <sys/syslog.h> 48 #include <sys/stat.h> 49 50 #include <vm/vm.h> 51 52 #define _VAX_BUS_DMA_PRIVATE 53 #include <machine/bus.h> 54 #include <machine/pte.h> 55 #include <machine/sid.h> 56 #include <machine/scb.h> 57 #include <machine/cpu.h> 58 #include <machine/trap.h> 59 #include <machine/nexus.h> 60 61 #include <machine/uvax.h> 62 #include <machine/ka410.h> 63 #include <machine/ka420.h> 64 #include <machine/ka43.h> 65 66 #include <machine/vsbus.h> 67 68 #include "ioconf.h" 69 #include "opt_cputype.h" 70 71 int vsbus_match __P((struct device *, struct cfdata *, void *)); 72 void vsbus_attach __P((struct device *, struct device *, void *)); 73 int vsbus_print __P((void *, const char *)); 74 int vsbus_search __P((struct device *, struct cfdata *, void *)); 75 76 static struct vax_bus_dma_tag vsbus_bus_dma_tag = { 77 0, 78 0, 79 0, 80 0, 81 0, 82 0, 83 _bus_dmamap_create, 84 _bus_dmamap_destroy, 85 _bus_dmamap_load, 86 _bus_dmamap_load_mbuf, 87 _bus_dmamap_load_uio, 88 _bus_dmamap_load_raw, 89 _bus_dmamap_unload, 90 _bus_dmamap_sync, 91 _bus_dmamem_alloc, 92 _bus_dmamem_free, 93 _bus_dmamem_map, 94 _bus_dmamem_unmap, 95 _bus_dmamem_mmap, 96 }; 97 98 extern struct vax_bus_space vax_mem_bus_space; 99 100 struct cfattach vsbus_ca = { 101 sizeof(struct vsbus_softc), vsbus_match, vsbus_attach 102 }; 103 104 int 105 vsbus_print(aux, name) 106 void *aux; 107 const char *name; 108 { 109 struct vsbus_attach_args *va = aux; 110 111 printf(" csr 0x%lx vec %o ipl %x maskbit %d", va->va_paddr, 112 va->va_cvec & 511, va->va_br, va->va_maskno - 1); 113 return(UNCONF); 114 } 115 116 int 117 vsbus_match(parent, cf, aux) 118 struct device *parent; 119 struct cfdata *cf; 120 void *aux; 121 { 122 if (vax_bustype == VAX_VSBUS) 123 return 1; 124 return 0; 125 } 126 127 void 128 vsbus_attach(parent, self, aux) 129 struct device *parent, *self; 130 void *aux; 131 { 132 struct vsbus_softc *sc = (void *)self; 133 134 printf("\n"); 135 136 sc->sc_dmatag = vsbus_bus_dma_tag; 137 138 switch (vax_boardtype) { 139 #if VAX49 140 case VAX_BTYP_49: 141 sc->sc_vsregs = vax_map_physmem(0x25c00000, 1); 142 sc->sc_intreq = (char *)sc->sc_vsregs + 12; 143 sc->sc_intclr = (char *)sc->sc_vsregs + 12; 144 sc->sc_intmsk = (char *)sc->sc_vsregs + 8; 145 vsbus_dma_init(sc, 8192); 146 break; 147 #endif 148 149 #if VAX46 || VAX48 150 case VAX_BTYP_48: 151 case VAX_BTYP_46: 152 sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); 153 sc->sc_intreq = (char *)sc->sc_vsregs + 15; 154 sc->sc_intclr = (char *)sc->sc_vsregs + 15; 155 sc->sc_intmsk = (char *)sc->sc_vsregs + 12; 156 vsbus_dma_init(sc, 32768); 157 #endif 158 159 default: 160 sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); 161 sc->sc_intreq = (char *)sc->sc_vsregs + 15; 162 sc->sc_intclr = (char *)sc->sc_vsregs + 15; 163 sc->sc_intmsk = (char *)sc->sc_vsregs + 12; 164 break; 165 } 166 167 /* 168 * First: find which interrupts we won't care about. 169 * There are interrupts that interrupt on a periodic basic 170 * that we don't want to interfere with the rest of the 171 * interrupt probing. 172 */ 173 *sc->sc_intmsk = 0; 174 *sc->sc_intclr = 0xff; 175 DELAY(1000000); /* Wait a second */ 176 sc->sc_mask = *sc->sc_intreq; 177 printf("%s: interrupt mask %x\n", self->dv_xname, sc->sc_mask); 178 /* 179 * now check for all possible devices on this "bus" 180 */ 181 config_search(vsbus_search, self, NULL); 182 183 /* Autoconfig finished, enable interrupts */ 184 *sc->sc_intmsk = ~sc->sc_mask; 185 } 186 187 int 188 vsbus_search(parent, cf, aux) 189 struct device *parent; 190 struct cfdata *cf; 191 void *aux; 192 { 193 struct vsbus_softc *sc = (void *)parent; 194 struct vsbus_attach_args va; 195 int i, vec, br; 196 u_char c; 197 198 va.va_paddr = cf->cf_loc[0]; 199 va.va_addr = vax_map_physmem(va.va_paddr, 1); 200 va.va_dmat = &sc->sc_dmatag; 201 va.va_iot = &vax_mem_bus_space; 202 203 *sc->sc_intmsk = 0; 204 *sc->sc_intclr = 0xff; 205 scb_vecref(0, 0); /* Clear vector ref */ 206 207 i = (*cf->cf_attach->ca_match) (parent, cf, &va); 208 vax_unmap_physmem(va.va_addr, 1); 209 c = *sc->sc_intreq & ~sc->sc_mask; 210 if (i == 0) 211 goto forgetit; 212 if (i > 10) 213 c = sc->sc_mask; /* Fooling interrupt */ 214 else if (c == 0) 215 goto forgetit; 216 217 *sc->sc_intmsk = c; 218 DELAY(100); 219 *sc->sc_intmsk = 0; 220 va.va_maskno = ffs((u_int)c); 221 i = scb_vecref(&vec, &br); 222 if (i == 0) 223 goto fail; 224 if (vec == 0) 225 goto fail; 226 227 va.va_br = br; 228 va.va_cvec = vec; 229 230 config_attach(parent, cf, &va, vsbus_print); 231 return 0; 232 233 fail: 234 printf("%s%d at %s csr %x %s\n", 235 cf->cf_driver->cd_name, cf->cf_unit, parent->dv_xname, 236 cf->cf_loc[0], (i ? "zero vector" : "didn't interrupt")); 237 forgetit: 238 return 0; 239 } 240 241 /* 242 * Sets a new interrupt mask. Returns the old one. 243 * Works like spl functions. 244 */ 245 unsigned char 246 vsbus_setmask(mask) 247 unsigned char mask; 248 { 249 struct vsbus_softc *sc; 250 unsigned char ch; 251 252 if (vsbus_cd.cd_ndevs == 0) 253 return 0; 254 sc = vsbus_cd.cd_devs[0]; 255 256 ch = *sc->sc_intmsk; 257 *sc->sc_intmsk = mask; 258 return ch; 259 } 260 261 /* 262 * Clears the interrupts in mask. 263 */ 264 void 265 vsbus_clrintr(mask) 266 unsigned char mask; 267 { 268 struct vsbus_softc *sc; 269 270 if (vsbus_cd.cd_ndevs == 0) 271 return; 272 sc = vsbus_cd.cd_devs[0]; 273 274 *sc->sc_intclr = mask; 275 } 276 277 /* 278 * Copy data from/to a user process' space from the DMA area. 279 * Use the physical memory directly. 280 */ 281 void 282 vsbus_copytoproc(p, from, to, len) 283 struct proc *p; 284 caddr_t from, to; 285 int len; 286 { 287 struct pte *pte; 288 paddr_t pa; 289 290 pte = uvtopte(TRUNC_PAGE(to), (&p->p_addr->u_pcb)); 291 if ((vaddr_t)to & PGOFSET) { 292 int cz = ROUND_PAGE(to) - (vaddr_t)to; 293 294 pa = (pte->pg_pfn << VAX_PGSHIFT) | (NBPG - cz) | KERNBASE; 295 bcopy(from, (caddr_t)pa, min(cz, len)); 296 from += cz; 297 to += cz; 298 len -= cz; 299 pte += 8; /* XXX */ 300 } 301 while (len > 0) { 302 pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; 303 bcopy(from, (caddr_t)pa, min(NBPG, len)); 304 from += NBPG; 305 to += NBPG; 306 len -= NBPG; 307 pte += 8; /* XXX */ 308 } 309 } 310 311 void 312 vsbus_copyfromproc(p, from, to, len) 313 struct proc *p; 314 caddr_t from, to; 315 int len; 316 { 317 struct pte *pte; 318 paddr_t pa; 319 320 pte = uvtopte(TRUNC_PAGE(from), (&p->p_addr->u_pcb)); 321 if ((vaddr_t)from & PGOFSET) { 322 int cz = ROUND_PAGE(from) - (vaddr_t)from; 323 324 pa = (pte->pg_pfn << VAX_PGSHIFT) | (NBPG - cz) | KERNBASE; 325 bcopy((caddr_t)pa, to, min(cz, len)); 326 from += cz; 327 to += cz; 328 len -= cz; 329 pte += 8; /* XXX */ 330 } 331 while (len > 0) { 332 pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; 333 bcopy((caddr_t)pa, to, min(NBPG, len)); 334 from += NBPG; 335 to += NBPG; 336 len -= NBPG; 337 pte += 8; /* XXX */ 338 } 339 } 340
Indexes created Tue Sep 30 11:09:46 GMT 2025